Fast GB: LM4702 high power amp test board ;)

[veteran]

OK, I will order them. It's stereo chip so on my board you can assemble stereo amplifier 😉

 

[skrew_r]

Thank You Veteran ! 🙂,
I can use bank transfer for payment .
Please, send me information about this.

 

[taro28]

Give me a price for 2 pcb's and shipping to Zip 07230, Spain
taro28 AT gmail.com

thanks

 

[rapunzelelch]

Hallo steven344
ihave seen a shematic from you with irfp240 9240 and some driver mje15030 31 is it working well?
i have ask veteran about irfp240 9240 and he said its not so good
to take them because the threreshold is not god for lm4702.
the problem is the 2sk1530 201 are much expansive.

 

[steven344]

lm4702 with mosfets and driver transistors

The circuit does work ,it allows enough bias to turn on the mosfets using the driver transistors

 

[steven344]

schematic

The schematic

 

[yusuf]

I am interested. I am also interested in 4780 kit as shown in picture posted by you. Please let me know if available.

Thanks

 

[richyrich212t]

is This group buy still open ?? I am interested in 4 lm4702 boards

 

[DavidWardlaw]

I'm interested in buying Lm4702 board if available.

 

[skrew_r]

Hello Veteran, is there Lm4702 boards ?

 

[tino96]

This was a test board. Capacitors protect speakers but amplifier sound much better without them 😉 Supply voltage is limited to maximum OPA552 voltage range or (if regulators will be mounted) to about (+)(-)40VDC.

No, not yet. I'm waiting for my boards to start some real tests.

GB is closed. Soon I will put some pictures of my amplifier.

Hi veteran, I like drakula project, minal design, and (I think) good sound;
but I have found more and more project with small changes..
I've visited you site @ http://www.unisonus.com/projects/dracula.htm
but there are only some photos of your (good) work.
Do you have the schematic and the pcb that you've used?
and more... how set the bias current?.
Another... OPA445 have (+)(-)45VDC of voltage range in DIP8 package... can I use this opamp?
many tnx in advance